Update README.md

README.md

@@ -217,11 +217,13 @@ An example of "test" looks as follows
 
 #### Annotation process
 
-[More Information Needed]
+We set up two-stage annotation project via a crowd-sourcing platform Toloka:
+1. Data gathering stage: we provide the texts with possible mistakes to annotators and ask them to write the sentence correctly;
+2. Validation stage: we provide annotators with the pair of sentences (source and its corresponding correction from the previous stage) and ask them to check if the correction is right.
 
 #### Who are the annotators?
 
-[More Information Needed]
+Native Russian speakers who passed the language exam.
 
 ### Personal and Sensitive Information